440roadrunner
Well-Known Member
Even though the car wont crank at the key. Lets say the ignition control module in my car was the problem. Could I start it with the bypass or is that not possible(bypass with the screwdriver on the starter solenoid).
When you start a mopar by jumpering the starter relay, the coil voltage goes through the ballast resistor just like when running.
What this means is, the starter pulls down the battery voltage during crank
With the ignition receiving this low battery voltage MINUS the normal drop through the resistor, you really get a weak spark (or not at all)
Two ways to get a hot spark for start:
1 Use the key to crank. This engages the "bypass" circuit (IGN2) inside the switch, which feeds hot battery power directly out to the coil+ side of the ballast
2 If you must crank jumpering the relay, make up a heavy clip lead and clip one end to the coil +. Clip the other lead to "battery" such as the starter relay stud. This, then will also give you good hot coil voltage to start.